Metal Science and Heat Treatment

, Volume 48, Issue 9–10, pp 427–432 | Cite as

Metastable phases of electron type in titanium alloys with 3d-metals

  • G. I. Nosova
  • N. B. D’yakonova
  • I. V. Lyasotskii
Metastable Phases

Abstract

Conditions of formation and structural characteristics of metastable states forming due to changes in the concentration of alloying elements in titanium alloys with 3d-metals are considered. The states arising due to hardening from the range of solid solution and the states arising due to hardening from melt are studied. Growth in the concentration of alloying elements in all alloys of the type is accompanied by formation of a metastable ω-phase and an incommensurate ω-phase; in alloys of the Ti-Fe and Ti-Mn systems the formed phases also include icosahedral quasi-crystals and their approximants. Effects of various factors on the formation of metastable phases are discussed. An incommensurate ω-phase is considered as an example of specific nanocrystalline structure stabilized by electron interactions.

Keywords

Titanium Alloy Electron Concentration Microdiffraction Pattern Quasicrystalline Phase Icosahedral Quasicrystal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    G. I. Nosova, Phase Transformations in Titanium Alloys [in Russian], Metallurgiya, Moscow (1968).Google Scholar
  2. 2.
    Yu. A. Bagaryatskii, G. I. Nosova, and T. V. Tagunova, “The crystallographic structure and nature of the ω-phase in titanium alloys with chromium,” Dokl. Akad. Nauk SSSR, 32, 1225–1228 (1955).Google Scholar
  3. 3.
    D. De Fontaine, N. E. Paton, and J. C. Williams, “The omega phase transformation in titanium alloys as an example of displacement controlled reaction,” Acta Metall., 19, 1153–1162 (1971).CrossRefGoogle Scholar
  4. 4.
    K. K. Mc Cabe and S. L. Sass, “The initial of the omega phase transformation in Ti-V alloys,” Philos. Mag., 23, 957–970 (1971).Google Scholar
  5. 5.
    I. V. Lyasotskii, N. B. D’yakonova, and Yu. D. Tyapkin, “On the problem of crystal structure of solid solutions of transition metals with bcc structure,” Dokl. Akad. Nauk SSSR, 237(3), 81–84 (1977).Google Scholar
  6. 6.
    N. B. D’yakonova and I. V. Lyasotskii “A study of the fine crystal structure of solid solutions of Ti-Mn and Ti-Mo alloys by the method of diffusion scattering of x-rays and electrons,” Fiz. Met. Metalloved., 48, Issue 2, 332–341 (1979).Google Scholar
  7. 7.
    N. B. D’yakonova and I. V. Lyasotskii, “Incommensurate structures in titanium alloys,” Fiz. Met. Metalloved., 52, Issue 1, 119–127 (1981).Google Scholar
  8. 8.
    I. V. Lyasotskii and N. B. D’yakonova, “A study of the structure of anomalous solid solutions of titanium alloys,” Fiz. Met. Metalloved., 53, Issue 6, 1161–1168 (1982).Google Scholar
  9. 9.
    I. V. Lyasotskii and N. B. D’yakonova, “Crystal structure and special features of phase transformations in titanium alloys with ω-phase,” Izv. Vuzov, No. 3, 90–97 (1985).Google Scholar
  10. 10.
    W. Sinkler and D. E. Luzzi, “An electron diffraction investigation of the diffuse ω structure in quenched Ti-3d transition metal alloys,” Acta Metall. Mater., 42(4), 1249–1260 (1994).CrossRefGoogle Scholar
  11. 11.
    M. A. Krivoglaz, “Short-range ordering in metallic alloys,” Metallofizika, 6(1), 3–36 (1984).Google Scholar
  12. 12.
    R. A. Cowley, Adv. Phys., 47(1), 1–110 (1980).CrossRefGoogle Scholar
  13. 13.
    A. S. Shcherbakov, A. F. Prekul, and R. V. Pomoreev, “Thermally activated conductivity in Ti-base alloys exhibiting negative TCR,” Philos. Mag., 47(1), 63–72 (1983).Google Scholar
  14. 14.
    S. J. Poon, “Electronic properties of quasicrystals. An experimental review,” Adv. Phys., 41(4), 303–363 (1992).CrossRefGoogle Scholar
  15. 15.
    N. B. D’yakonova, D. L. D’yakonov, I. V. Lyasotskii, and G. I. Nosova, “Phase transformations in rapidly hardened titanium alloys with 25–29 at.% Fe,” Metally, No. 6, 68–76 (2003).Google Scholar
  16. 16.
    C. Dong, Z. K. Hei, L. B. Wang, et al., “A new icosahedral quasicrystal in rapidly solidified FeTi2,” Scr. Metall., 20, 1155–1158 (1986).CrossRefGoogle Scholar
  17. 17.
    C. Dong, K. Chattopadhyay, and K. H. Kuo, “Quasicrystalline eutectic growth and metastable phase orientation relations in rapidly solidified Fe-Ti alloys,” Scr. Metall., 21, 1307–1312 (1987).CrossRefGoogle Scholar
  18. 18.
    I. V. Lyasotskii, N. B. D’yakonova, D. L. D’yakonov, and G. I. Nosova, “Incommensurate quasicrystalline structures in rapidly hardened titanium alloys with manganese, iron, and silicon,” Metally, No. 2, 69–77 (2005).Google Scholar
  19. 19.
    N. B. D’yakonova, I. V. Lyasotskii, A. I. Zaitsev, and V. V. Luzanov, “Relation between the structure and the anomalous electric properties of titanium alloys,” Fiz. Tverd. Tela, 25(3), 2073–2079 (1983).Google Scholar
  20. 20.
    T. Takeuchi and U. Mizutani, “Electronic structure, electron transport properties, and relative stability of icosahedral quasicrystals and their 1/1 and 2/1 approximants in the Al-Mg-Zn alloy system,” Phys. Rev. B, 52, 9300–9309 (1995).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • G. I. Nosova
    • 1
  • N. B. D’yakonova
    • 1
  • I. V. Lyasotskii
    • 1
  1. 1.I. P. Bardin Central Research Institute for Ferrous Metallurgy (FGUP TsNIIChermet)MoscowRussia

Personalised recommendations